Something

# Filter records older than 7 days.
def lastSevenDays(dataLines, daysBack):
        from datetime import datetime, timedelta
        sevenAgo = datetime.today() - timedelta(days=daysBack)
        days = []
        for day in range(daysBack):
                days = days.append(sevenAgo.date())
                sevenAgo = sevenAgo + timedelta(days=1)
        last7DLines = []
        for line in dataLines:
                if re.compile(day).search(line):
                        last7DLines.append(line)
                else:
                        pass
        return last7DLines

dataLines = lastSevenDays(dataLines, 7)